0 in a hurried way, without much detail:
The prices were very roughly calculated - it looked as though he'd done them on the back of an envelope.
Drawing on the back of an envelope: a framework for interacting with application programs by freehand drawing.
Programs should be read as well as written, often on the back of an envelope.
From simple sums on the back of an envelope, assuming a minimum average of £110 a week, a total of £124 million is necessary.
The figure of 1,500 seems to have been scribbled on the back of an envelope and it cannot be justified by any serious research.
For example, a scribbled figure on the back of an envelope would fulfil the intention behind the amendment.
I have made the calculation on the back of an envelope: the figure is almost 2 million dissatisfied customers.
Perhaps it is being done on the back of an envelope.
We are extremely worried about that proposal, which was no doubt drawn up on the back of an envelope.
